Abstract: A coal mining mining plow comprising a plow base, two cutting bit carriers pivotably supported on a respective pivot pin, a roof cutting bit carrier attached to the plow base in a height-adjustable manner, and an attachment member settable on the plow base is disclosed. The attachment member may include ancillary cutting bit columns provided with extraction cutting bits. Each ancillary cutting bit column may be respectively positioned in its extraction position for a plow trip above a cutting bit carrier, and an intermediate member may be disposed between the attachment member and each ancillary cutting bit column. The intermediate member may be foldable attached to the attachment member and may be folded away into an installation position, in which the corresponding cutting bit carrier is removable while the attachment member and the intermediate part remain installed.

Abstract: A roof cutter holder adjustment device for a roof cutter holder arranged in a vertically adjustable manner on a plow body of a winning plow, comprising a worm wheel for interacting with a rack-like tooth system on the roof cutter holder, an input shaft for actuating the worm wheel, and comprising a head plate which has a passage for the input shaft and which can be fastened or is fastened to the plow body in a rotationally fixed manner. In order to enable the roof cutter holder adjustment device to be mounted and released in a simple manner, the head plate has at least one fastening device, to which a securing element which can be put onto the free end of the input shaft can be fastened in a rotationally fixed manner in the mounted state.

Abstract: A shearer-loader drive subassembly having a rotatably mounted drive sprocket, a transmission gear connected to the sprocket in a rotationally fixed manner, at least one releasable guide shoe provided for guiding the shearer loader on a rack arrangement, and a housing base plate, on which a bearing tube is supported and fastened in a rotationally fixed manner. The guide shoe is fastened by a pin which passes through the inner bore of the bearing tube and forms the pivot bearing for the guide shoe. A bearing sleeve rotatably supported on the bearing tube by a bearing may be arranged between the drive sprocket and the bearing tube, onto which bearing sleeve the drive sprocket may be pushed in a releasable manner.

Abstract: The invention relates to a foundation construction device for making trenches in the soil comprising a frame, on which a soil-removing tool is arranged, and a control device for aligning the foundation construction device in the trench having two control flaps, which are supported pairwise opposite each other on the frame, and having at least one extendable and retractable guide wheel arranged on the frame.

Abstract: A mining machine for underground mining is disclosed, particularly an extraction or coal plough. When in use, the mining machine is guided along a machine guide, said machine guide including a guide rail and a guide pawl. The guide pawl engaging around said guide rail from above wherein a guide piece is disposed between said guide pawl and said guide rail. The guide piece is releasably attached or attachable to said guide pawl and is sliding along said guide rail. According to the invention, said guide pawl has at least one support means whereassaid guide piece in its installation position is supported on said support means. Further, the guide piece with said guide pawl is fixed by means of a locking mechanism in the longitudinal direction of said guide rail.